Kramertunnel

Rerouting B 23 and construction of the Kramertunnel (2 lane road tunnel)

Client

Staatliches Bauamt Weilheim
Münchener Straße 39
82362 Weilheim
Germany

Contractor

BeMo Tunnelling GmbH, Niederlassung West
in Joint Venture „JV Kramertunnel“ with Subterra a.s.
BeMo-share 70 %

Project location

82467 Garmisch-Partenkirchen
Germany

Start of construction

2019

End of construction

2023

Project total value

150 million €

Geology

Kramer-Massif (predominant Carbonate/solid rocks and soft ground).
Solid rocks: main dolomite, platy limestone, Kössen formation. Overlying quarternary soft ground material such as Morain-/rockfall sediments, mudslide-/gravel sediments, slope debris and alluvial valley sediments.

Technical Data

Construction of a 2-lane road tunnel (1 tube) incl. completion of a rescue tunnel; ventilation shaft incl. ventilation structure (structural works), trough structure at the North Portal and tunnel access areas North and South.
Tunnel
• Length: 3,609.00 m
• Conventional Driving: 3,524.00 m
- thereof in solid rocks: 2,977.00 m
- thereof in soft ground: 574.00 m
• Cut-and-Cover method: 85.00 m
• Cross-section: ≤ 157.00 m²
• Execution: by drill and blast and roadheader, excavator, NATM
• Support: shotcrete, tunnel archs/ lattice girder, wire mesh
• Secondary lining: in-situ concrete reinforced/unreinforced
Rescue Tunnel
• Length: 3,703.00 m
• Conventional Driving 349.00 m
- thereof in soft ground: 349.00 m
• Cut-and-Cover method: 22.00 m
• Cross-section: ≤ 43.00 m²
• Execution: by roadheader, excavator, NATM
• Support: shotcrete, tunnel archs/ lattice girder, wire mesh
• Secondary lining: in-situ concrete reinforced/unreinforced
Shaft
• Depth: 118 m / Sinking Depth: 79 m / Ø: 4.50m
Secondary Lining: in-situ concrete, reinforced

Further project related information

• Construction road junction Garmisch/Burgrain
• New construction operations building
• Ground engineering works (anchored retaining walls) as well as water drainage works (vertical filter well and gravel piles)
• Structural Analysis and Detailed Design by BeMo’s Tunnel Design Department